<html>
<head>
    <meta charset="UTF-8">
    <title>布局</title>
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <link href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="css/style.css">
</head>
<body>


<div class="container">
    <div class="row">
        <div class="col-md-4">
            <div class="list">内容</div>
        </div>
        <div class="col-md-4">
            <div class="row">
                <div class="col-6">
                    <div class="list">内容</div>
                </div>
                <div class="col-6">
                    <div class="list">内容</div>
                </div>
                <div class="col-6">
                    <div class="list">内容</div>
                </div>
                <div class="col-6">
                    <div class="list">内容</div>
                </div>
            </div>
        </div>
        <div class="col-md-4">
            <div class="list">内容</div>
        </div>
    </div>
</div>


</body>
</html>